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authorMystery Man <unknown@mandriva.org>2001-08-07 17:40:36 +0000
committerMystery Man <unknown@mandriva.org>2001-08-07 17:40:36 +0000
commit068d599562888a36a50e5bbdeb8b70f83fa7c287 (patch)
tree18f5eed8353b3af647412875d438b55ef8c07670 /perl-install/tinyfirewall.pm
parentbe838931607e1ab14c8c699e20dd807b55579f7b (diff)
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Diffstat (limited to 'perl-install/tinyfirewall.pm')
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diff --git a/perl-install/tinyfirewall.pm b/perl-install/tinyfirewall.pm
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-package tinyfirewall;
-use diagnostics;
-use strict;
-use commands;
-use run_program;
-use network::netconnect;
-use network;
-use POSIX qw(tmpnam);
-use MDK::Common;
-my @messages = (_("tinyfirewall configurator
-
-This configures a personal firewall for this Mandrake Linux machine.
-For a powerful dedicated firewall solution, please look to the
-specialized MandrakeSecurity Firewall distribution."),
-_("We'll now ask you questions about which services you'd like to allow
-the Internet to connect to. Please think carefully about these
-questions, as your computer's security is important.
-
-Please, if you're not currently using one of these services, firewall
-it off. You can change this configuration anytime you like by
-re-running this application!"),
-_("Are you running a web server on this machine that you need the whole
-Internet to see? If you are running a webserver that only needs to be
-accessed by this machine, you can safely answer NO here.
-
-"),
-_("Are you running a name server on this machine? If you didn't set one
-up to give away IP and zone information to the whole Internet, please
-answer no.
-
-"),
-_("Do you want to allow incoming Secure Shell (ssh) connections? This
-is a telnet-replacement that you might use to login. If you're using
-telnet now, you should definitely switch to ssh. telnet is not
-encrypted -- so some attackers can steal your password if you use
-it. ssh is encrypted and doesn't allow for this eavesdropping."),
-_("Do you want to allow incoming telnet connections?
-This is horribly unsafe, as we explained in the previous screen. We
-strongly recommend answering No here and using ssh in place of
-telnet.
-"),
-_("Are you running an FTP server here that you need accessible to the
-Internet? If you are, we strongly recommend that you only use it for
-Anonymous transfers. Any passwords sent by FTP can be stolen by some
-attackers, since FTP also uses no encryption for transferring passwords.
-"),
-_("Are you running a mail server here? If you're sending you
-messages through pine, mutt or any other text-based mail client,
-you probably are. Otherwise, you should firewall this off.
-
-"),
-_("Are you running a POP or IMAP server here? This would
-be used to host non-web-based mail accounts for people via
-this machine.
-
-"),
-_("You appear to be running a 2.2 kernel. If your network IP
-is automatically set by a computer in your home or office
-(dynamically assigned), we need to allow for this. Is
-this the case?
-"),
-_("Is your computer getting time syncronized to another computer?
-Mostly, this is used by medium-large Unix/Linux organizations
-to synchronize time for logging and such. If you're not part
-of a larger office and haven't heard of this, you probably
-aren't."),
-_("Configuration complete. May we write these changes to disk?
-
-
-
-")
-);
-my %settings;
-my $config_file = "/etc/Bastille/bastille-firewall.cfg";
-my $default_config_file = "/usr/share/Bastille/bastille-firewall.cfg"; # set this later
-sub ReadConfig {
- -e $config_file or commands::cp($default_config_file, $config_file);
- add2hash(\%settings, { getVarsFromSh("$config_file") });
-}
-sub SaveConfig {
- my $tmp_file = tmpnam();
- open CONFIGFILE, "$config_file"
- or die _("Can't open %s: %s\n", $config_file, $!);
- open TMPFILE, ">$tmp_file"
- or die _("Can't open %s for writing: %s\n", $tmp_file, $!);
- while (my $line = <CONFIGFILE>)
- {
- if ($line =~ m/^(.+)\s*\=\s*\"(.*)\"/)
- {
- my ($variable, $value) = ($1, $2);
- my $newvalue = $settings{$variable};
- $line =~ s/\".*\"/\"$newvalue\"/
- if (exists $settings{$variable});
- }
- print TMPFILE $line;
- }
- close CONFIGFILE;
- close TMPFILE;
- rename ($config_file, $config_file . ".orig");
- system ("/bin/cp $tmp_file $config_file");
- system ("/bin/rm $tmp_file");
-}
-sub DoInterface {
- my ($in)=@_;
- $::isWizard=1;
- my $GetNetworkInfo = sub {
- $settings{DNS_SERVERS} = join(' ', uniq(split(' ', $settings{DNS_SERVERS}),
- @{network::read_resolv_conf("/etc/resolv.conf")}{'dnsServer', 'dnsServer2', 'dnsServer3'}));
- my (undef, undef, @netstat) = `/bin/netstat -in`;
- my @interfaces = map { /(\S+)/ } @netstat;
- my (@route, undef, undef) = `/sbin/route -n`;
- my $defaultgw;
- my $iface;
- foreach (@route) { my @parts = split /\s+/; $parts[0] eq "0.0.0.0" and $defaultgw = $parts[1], $iface = $parts[7] }
- my $fulliface = $iface;
- $fulliface =~ s/[0-9]+/\\\+/;
- $settings{PUBLIC_INTERFACES} = join(' ', uniq(split(' ', $settings{PUBLIC_INTERFACES}), $iface));
- $settings{PUBLIC_INTERFACES} =~ $fulliface and $settings{PUBLIC_INTERFACES} =~ s/$iface *//;
- $settings{INTERNAL_IFACES} = join(' ', uniq(split(' ', $settings{INTERNAL_IFACES}),
- map { my $i=$_; my $f=$i; $f=~s/[0-9]+/\\\+/;
- if_(and_( map {$settings{$_} !~ /$i/ and $settings{$_} !~ /$f/ } ('TRUSTED_IFACES', 'PUBLIC_IFACES', 'INTERNAL_IFACES')), $i)
- } @interfaces ));
- };
-# my $popimap = sub { $_[0] or return; $settings{FORCE_PASV_FTP} = 11; mapn {$settings{"$_[0]"} = "$_[1]"; }
-#[ qw(FORCE_PASV_FTP TCP_BLOCKED_SERVICES UDP_BLOCKED_SERVICES ICMP_ALLOWED_TYPES ENABLE_SRC_ADDR_VERIFY IP_MASQ_NETWORK IP_MASQ_MODULES REJECT_METHOD) ] ,
-#[ "N", "6000:6020", "2049", "destination-unreachable echo-reply time-exceeded" , "Y", "", "", "DENY" ]; };
- my $popimap = sub {
- $_[0] or return;
- $settings{'FORCE_PASV_FTP'} = "N";
- $settings{TCP_BLOCKED_SERVICES}= "6000:6020";
- $settings{UDP_BLOCKED_SERVICES}= "2049";
- $settings{ICMP_ALLOWED_TYPES}= "destination-unreachable echo-reply time-exceeded";
- $settings{ENABLE_SRC_ADDR_VEIFY}= "Y";
- $settings{IP_MASQ_NETWORK}= "";
- $settings{IP_MASQ_MODULES}= "";
- $settings{REJECT_METHOD}= "DENY";
- };
- # my $ntp = sub { $_[0] or return; mapn { $settings{$_[0]} = $_[1] } ['ICMP_OUTBOUND_DISABLED_TYPES}', 'LOG_FAILURES'], [ "", "N"] };
- my $ntp = sub { $_[0] or return;
- $settings{'ICMP_OUTBOUND_DISABLED_TYPES}'} = "";
- $settings{'LOG_FAILURES'} = "N";
- };
- my $dhcp = sub { if ($_[0]) {
- $settings{DHCP_IFACES} and return;
- my (undef, undef, @netstat) = `/bin/netstat -in`;
- $settings{DHCP_IFACES} = join(' ', split(' ', $settings{DHCP_IFACES}), map { /(\S+)/ } @netstat );
- } else { $settings{DHCP_IFACES} = "" } };
- my $quit = sub {
- $_[0] or $in->exit(0);
- SaveConfig();
- system($_) foreach ("/bin/cp /usr/share/Bastille/bastille-ipchains /usr/share/Bastille/bastille-netfilter /sbin",
- "/bin/cp /usr/share/Bastille/bastille-firewall /etc/rc.d/init.d/",
- "/bin/chmod 0700 /etc/rc.d/init.d/bastille-firewall", "/bin/chmod 0700 /sbin/bastille-ipchains",
- "/bin/chmod 0700 /sbin/bastille-netfilter", "/sbin/chkconfig bastille-firewall on",
- "/etc/rc.d/init.d/bastille-firewall stop", "/etc/rc.d/init.d/bastille-firewall start");
- $in->exit(0);
- return;
- $_[0] or $in->exit(0);
- commands::cp("-f", $config_file, $config_file . ".orig");
- substInFile {
- if(/^(.+)\s*\=/) {
- $a=$settings{$1};
- s/\".*\"/\"$a\"/;
- }
- } $config_file;
- system($_) foreach ("/bin/cp /usr/share/Bastille/bastille-ipchains /usr/share/Bastille/bastille-netfilter /sbin",
- "/bin/cp /usr/share/Bastille/bastille-firewall /etc/rc.d/init.d/",
- "/bin/chmod 0700 /etc/rc.d/init.d/bastille-firewall", "/bin/chmod 0700 /sbin/bastille-ipchains",
- "/bin/chmod 0700 /sbin/bastille-netfilter", "/sbin/chkconfig bastille-firewall on",
- "/etc/rc.d/init.d/bastille-firewall stop", "/etc/rc.d/init.d/bastille-firewall start"); };
- my @struct = (
- [$GetNetworkInfo],
- [],
- [undef , undef, undef, undef, ["tcp", "80"], ["tcp", "443"]],
- [undef , undef, undef, undef, ["tcp", "53"], ["udp", "53"]],
- [undef , undef, undef, undef, ["tcp", "22"]],
- [undef , undef, undef, undef, ["tcp", "23"]],
- [undef , undef, undef, undef, ["tcp", "20"],["tcp", "21"]],
- [undef , undef, undef, undef, ["tcp", "25"]],
- [undef , undef, undef, $popimap, ["tcp", "109"], ["tcp", "110"], ["tcp", "143"]],
- [undef , _("No I don't need DHCP"), _("Yes I need DHCP"), $dhcp],
- [undef , _("No I don't need NTP"), _("Yes I need NTP"), $ntp ],
- [undef , _("Don't Save"), _("Save & Quit"), $quit ]
- );
- if (!Kernel22()) {
- pop @struct; pop @struct; pop @struct;
- @struct = ( @struct, [undef , _("Don't Save"), _("Save & Quit"), $quit ] );
- $messages[9]=$messages[11];
- }
- for (my $i=0;$i<@struct;$i++) {
- $::Wizard_no_previous = $i == 0;
- $::Wizard_finished = $i == $#struct;
- my $l = $struct[$i];
- @$l or goto ask;
- if (@$l == 1) {
- ($l->[0])->();
- ask:
- $in->ask_okcancel(_("Firewall Configuration Wizard"), $messages[$i],1) ? next : goto prev;
- }
- my $no = $l->[1] ? $l->[1] : _("No (firewall this off from the internet)");
- my $yes = $l->[2] ? $l->[2] : _("Yes (allow this through the firewall)");
- if (my $e = $in->ask_from_list_(_("Firewall Configuration Wizard"),
- $messages[$i],
- [ $yes, $no ], or_( map { $_ && CheckService($_->[0], $_->[1]) } (@$l[4..6])) ? $yes : $no
- )) {
- map { $_ and Service($e=~/Yes/, $_->[0], $_->[1]) } (@{$struct[$i]}[4..6]);
- $struct[$i][3] and $struct[$i][3]->($e=~/Yes/ || $e eq _("Save & Quit"));
- } else {
- prev:
- $i = $i-2 >= -1 ? $i-2 : -1;
- }
- }
-}
-sub unbox_service {
- split ' ', $settings{uc($_[0]) . "_PUBLIC_SERVICES"}
-}
-sub Service {
- my ($add, $protocol, $port) = @_;
- my @l = unbox_service($protocol);
- @l = uniq($add ? (@l, $port) : grep { $_ ne $port } @l);
- $settings{uc($protocol) . "_PUBLIC_SERVICES"} = join(' ', @l);
-}
-sub CheckService { member($_[1], unbox_service($_[0])); }
-sub Kernel22 {
- my ($major, $minor, $patchlevel) = (cat_("/proc/version"))[0] =~ m/^Linux version ([0-9]+)\.([0-9]+)\.([0-9]+)/;
- $major eq "2" && $minor eq "2";
-}
-sub main {
- my ($in)=@_;
- my $dialog = new Gtk::Dialog();
- $dialog->set_position(1);
- $dialog->vbox->set_border_width(10);
- my $label = new Gtk::Label(_("Please Wait... Verifying installed packages"));
- $dialog->signal_connect ( delete_event => sub { Gtk->main_quit(); });
- $dialog->vbox->pack_start($label,1,1,20);
- $dialog->show_all;
- Gtk->main_iteration while Gtk->events_pending;
- if ($in->standalone::pkgs_install(Kernel22() ? "ipchains" : "iptables", "Bastille")) {
- $in->ask_warn('', _("Failure installing the needed packages : %s and Bastille.
- Try to install them manually.", Kernel22() ? "ipchains" : "iptables") );
- $dialog->destroy;
- $in->exit(0);
- }
- ReadConfig;
- DoInterface($in);
-}